<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <div id="app"></div>
  <template id="my-app">
    <h2>歌曲列表</h2>
    <ul>
      <li v-for="(item, index) in songs" :key="index">
        {{index+1}} -- {{item}}
        <a href="#" @click="del(index)">x</a>
      </li>
    </ul>

  </template>


  <script src="https://unpkg.com/vue@3/dist/vue.global.js"></script>
  <script>
    const App = {
      template: '#my-app',
      data() {
        return {
          songs: [
            '不能说的秘密',
            '等你下课',
            '说好不哭',
            '晴天',
            '告白气球'
          ]
        }
      },
      methods: {
        del(i) {
          this.songs.splice(i, 1);
        }
      }
    }
    Vue.createApp(App).mount('#app')
  </script>
</body>
</html>